<template>
  <div
    class="login"
    :style="{backgroundImage: `url(${background})`}"
  >
    <el-form
      ref="loginRef"
      :model="loginForm"
      :rules="loginRules"
      class="login-form login-container"
    >
      <h3 class="title">
        {{ systemTitle }}
      </h3>
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          size="large"
          auto-complete="off"
          placeholder="账号"
        >
          <template #prefix>
            <svg-icon
              icon-class="user"
              class="el-input__icon input-icon"
            />
          </template>
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          size="large"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter="handleLogin"
        >
          <template #prefix>
            <svg-icon
              icon-class="password"
              class="el-input__icon input-icon"
            />
          </template>
        </el-input>
      </el-form-item>
      <!--
      <el-form-item
        prop="code"
        v-if="captchaEnabled"
      >
        <el-input
          v-model="loginForm.code"
          size="large"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleLogin"
        >
          <template #prefix>
            <svg-icon
              icon-class="validCode"
              class="el-input__icon input-icon"
            />
          </template>
        </el-input>
        <div class="login-code">
          <img
            :src="codeUrl"
            @click="getCode"
            class="login-code-img"
          >
        </div>
      </el-form-item>
-->
      <el-checkbox
        v-model="loginForm.rememberMe"
        style="margin:0px 0px 25px 0px;"
      >
        记住密码
      </el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="large"
          type="primary"
          style="width:100%;"
          @click.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div
          style="float: right;"
          v-if="register"
        >
          <router-link
            class="link-type"
            :to="'/register'"
          >
            立即注册
          </router-link>
        </div>
      </el-form-item>
    </el-form>
  </div>
</template>

<script setup>
import { getCodeImg } from '@/api/login'
import { getSetting } from '@/api/system/setting'
import Cookies from 'js-cookie'
import { encrypt, decrypt } from '@/utils/jsencrypt'
import useUserStore from '@/store/modules/user'
import loginBg from '@/assets/images/login-bg.png'
const userStore = useUserStore()
const route = useRoute()
const router = useRouter()
const { proxy } = getCurrentInstance()
const background = ref('')
const systemTitle = ref('数据库管理系统')
const loginForm = ref({
  username: 'admin',
  password: 'admin123',
  rememberMe: false,
  code: '',
  uuid: ''
})

const loginRules = {
  username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
  password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
  code: [{ required: true, trigger: 'change', message: '请输入验证码' }]
}

const codeUrl = ref('')
const loading = ref(false)
// 验证码开关
const captchaEnabled = ref(true)
// 注册开关
const register = ref(false)
const redirect = ref(undefined)

watch(route, (newRoute) => {
  redirect.value = newRoute.query && newRoute.query.redirect
}, { immediate: true })

function handleLogin () {
  proxy.$refs.loginRef.validate(valid => {
    if (valid) {
      loading.value = true
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        Cookies.set('username', loginForm.value.username, { expires: 30 })
        Cookies.set('password', encrypt(loginForm.value.password), { expires: 30 })
        Cookies.set('rememberMe', loginForm.value.rememberMe, { expires: 30 })
      } else {
        // 否则移除
        Cookies.remove('username')
        Cookies.remove('password')
        Cookies.remove('rememberMe')
      }
      // 调用action的登录方法
      userStore.login(loginForm.value).then(() => {
        const query = route.query
        const otherQueryParams = Object.keys(query).reduce((acc, cur) => {
          if (cur !== 'redirect') {
            acc[cur] = query[cur]
          }
          return acc
        }, {})
        router.push({ path: redirect.value || '/', query: otherQueryParams })
      }).catch(() => {
        loading.value = false
        // 重新获取验证码
        if (captchaEnabled.value) {
          getCode()
        }
      })
    }
  })
}

function getCode () {
  getCodeImg().then(res => {
    captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled
    if (captchaEnabled.value) {
      codeUrl.value = 'data:image/gif;base64,' + res.img
      loginForm.value.uuid = res.uuid
    }
  })
}

function getCookie () {
  const username = Cookies.get('username')
  const password = Cookies.get('password')
  const rememberMe = Cookies.get('rememberMe')
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
  }
}
function getSystem () {
  getSetting().then(res => {
    console.log(res.data)
    if (res.data) {
      background.value = res.data.loginImage
      systemTitle.value = res.data.loginTitle
    } else {
      background.value = loginBg
    }
  })
}
getCode()
getCookie()
getSystem()

</script>

<style lang='scss' scoped>
/*.login-container {
  position: absolute;
  top: 50%;
  right: 15%;
  transform: translateY(-50%);
}*/
@media only screen and (max-width: 1200px) {
  .login-container {
    position: absolute;
    right: 3%;
    top: 50%;
    transform: translateY(-50%);
  }
}
@media only screen and (min-width: 1200px) and (max-width: 1500px) {
  .login-container {
    position: absolute;
    right: 6%;
    top: 50%;
    transform: translateY(-50%);
  }
}

/* 适用于大屏幕设备（如桌面，宽度大于900px） */
@media only screen and (min-width: 1500px) {
  .login-container {
    position: absolute;
    right: 15%;
    top: 50%;
    transform: translateY(-50%);
  }
}
.login {
  height: 100%;
  // background-image: url("../assets/images/login-bg.png");
  background-size: 100% 100%;
}
.title {
  margin: 0px auto 70px auto;
  text-align: center;
  color: #707070;
  font-size: 30px;
}

.login-form {
  border-radius: 6px;
  width: 500px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 50px;
    width: 700px;
    font-size: 22px;
    input {
      height: 40px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 40px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>
